Contour Example 4: Annotation of Images

     This example is also available on YouTube.

Introduction

In this example we like to calculate the volume of our object, in this case the part of the lung we have segmented.

Steps to do

Develop your network and calculate the lung volume

Add the module CalculateVolume and SoView2DAnnotation to your workspace and connect both modules as shown. Update the module CalculateVolume, which directly shows the volume of our object.

Display the lung volume in the image

We now like to display the volume in the image viewer. For this, open the panel of the modules CalculateVolume and SoView2DAnnotation. Open the tab Input in the panel of the module SoView2DAnnotation. Now construct a parameter connection between Total Volume calculated in the module CalculateVolume and the input00 of the module SoView2DAnnotation. This connection projects the Total Volume to the input of SoView2DAnnotation.

Go back to the tab General to select the Annotation Mode User. A separate tab exists for each annotation mode.

We select the tab User which we like to work on. You can see four fields, which display four areas of a viewer in which you can add information text to the image.

In this example we only like to add the volume, so delete all present input and replace that by the shown text. Now, you can see that the volume is displayed in the image viewer. If this is not the case, switch the annotations of the viewer by pressing the keyboard shortcut A .

Summary

• CalculateVolume can calculate the volume of a voxel image
• SoView2DAnnotation enables to manually change the annotation mode of a viewer
• Annotations shown in a View2D can be customized by using a SoView2DAnnotation module

   Download .mlab file here.